Behavior Driven Development (BDD) in Java is a software development approach that emphasizes collaboration between developers, testers, and non-technical stakeholders. It builds on the principles of Test Driven Development (TDD) by focusing on the expected behavior of an application rather than its implementation details. In BDD, specifications are written in a human-readable format, often using Gherkin syntax, which allows all team members to understand and contribute to the development process. Java frameworks like JUnit5 and Cucumber facilitate the implementation of BDD, enabling teams to create clear, executable specifications that guide the development of software that meets business needs.